No. 8: Gangnam Style

For the last dozen years, PSY has been a popular rapper and entertainer in South Korea. But in July, when he uploaded his video for "Gangnam Style" on YouTube, he became an international superstar. The song went viral to the tune of more than 800 million views and is currently the most viewed...

For the last dozen years, PSY has been a popular rapper and entertainer in South Korea. But in July, when he uploaded his video for "Gangnam Style" on YouTube, he became an international superstar. The song went viral to the tune of more than 800 million views and is currently the most viewed... (Getty Images)

For the last dozen years, PSY has been a popular rapper and entertainer in South Korea. But in July, when he uploaded his video for "Gangnam Style" on YouTube, he became an international superstar. The song went viral to the tune of more than 800 million views and is currently the most viewed...Getty Images